Download FreeRTOS

Quality RTOS & Embedded Software

Simplifying Authenticated Cloud Connectivity for Any Device.
Designing an energy efficient and cloud-connected IoT solution with CoAP.
Introducing FreeRTOS Kernel version 11.0.0:
FreeRTOS Roadmap and Code Contribution process.
OPC-UA over TSN with FreeRTOS.


[FreeRTOS-Plus-TCP API Reference]


Note: this hook needs to be defined only when ipconfigDHCP_REGISTER_HOSTNAME is set to 1 in the FreeRTOSIPConfig.h file.

const char * pcApplicationHostnameHook( void );

eApplicationHostnameHook is an application defined hook (or callback) function that is called by the FreeRTOS-Plus-TCP stack when an IP-address is requested from a DHCP server. This allows the device to register its hostname with the DHCP server.

Callback functions are implemented by the application writer, but called by the TCP/IP stack. The prototype of the callback function must exactly match the prototype above (including the function name). The code in an application hook should not call FreeRTOS-Plus-TCP API's that are blocking. That could easily lead to a dead-lock.

When an application hook executes, it borrows the task priority and the stack of the IP-task. Therefore, we recommend that you keep application hooks short--it may want to wakeup some application task which will do further processing.

Return value:

A NULL terminated hostname which the device can send to register with the DHCP server. The maximum length of the hostname can be 32 characters.

Copyright (C) Amazon Web Services, Inc. or its affiliates. All rights reserved.